Cov txheej txheem:
Video: DNA qauv zoo li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
DNA qauv
DNA yog ua los ntawm cov molecules hu ua nucleotides. Txhua nucleotide muaj ib pawg phosphate, pawg suab thaj thiab nitrogen hauv paus. Yog tias koj xav txog ob lub helix qauv as ib tug ntaiv, cov phosphate thiab qab zib molecules yuav yog sab, thaum lub hauv paus yuav yog cov rungs
Tib neeg kuj nug tias, lawv paub DNA zoo li cas?
Cov kws tshawb fawb tau tsim ib txoj hauv kev tshiab ntawm kev ntsuas lub tsev blocks ntawm lub neej. Nws suav nrog lub tshuab ntsuas hluav taws xob thiab lub txaj ntawm tes. Thaum peb saib ntawm cov duab tam sim no-icic ntawm ob lub helix, fuzzy X hauv fuzzy O, peb tsis pom qhov DNA Nws tus kheej ntau npaum li peb pom x-rays deflected los ntawm nws cov atoms.
Tsis tas li ntawd, DNA qauv ua haujlwm li cas? Cov hydrogen bonds ntawm phosphates ua rau lub DNA strand rau twist. Lub hauv paus nitrogenous taw tes rau sab hauv ntawm tus ntaiv thiab tsim ua khub nrog cov hauv paus rau sab nraud, zoo li rungs. Txhua lub hauv paus khub yog tsim los ntawm ob qho ntxiv nucleotides (purine nrog pyrimidine) ua ke los ntawm hydrogen bonds.
Yog li ntawd, DNA puas muaj cov duab tshwj xeeb lossis cov qauv?
Feem ntau DNA puab duab los ntawm cov kws kos duab thiab cov kws tshawb fawb zoo li zoo li tus ntaiv twisting. Cov kws tshawb fawb hu qhov no ua ob lub helix. DNA kuj folds thiab coils nws tus kheej mus rau hauv ntau complex cov duab . Cov coiled puab ua rau nws me me heev.
Puas muaj cov duab DNA?
Cov lus teb luv luv: Yog - Tsawg kawg ib qho, ib daim duab ntawm TEM (kev xa hluav taws xob hluav taws xob) duab, luam tawm Kaum Ib Hlis 2012.
Pom zoo:
Vim li cas Rutherford tus qauv hu ua tus qauv nuclear?
Rutherford tus qauv ntawm lub atom yog hu ua nuclear atom vim nws yog thawj atomic qauv los feature lub nucleus ntawm nws cov tub ntxhais
Dab tsi yog DNA zoo li cuam tshuam nws cov qauv tshuaj rau nws zoo li cas thaum muaj ntau ntawm nws yog clumped ua ke?
Hais txog nws cov qauv tshuaj rau nws zoo li cas thaum ntau nws yog clumped ua ke. DNA zoo li kab laug sab webs. DNA tau soluble hauv DNA extraction tsis yog li peb tsis pom nws. Thaum nws tau stirred rau hauv ethanol, nws clumped ua ke thiab tsim thicker thiab thicker strands loj txaus kom pom
Vim li cas tsis zoo thiab tsis zoo yog qhov zoo?
Thaum koj muab qhov tsis zoo los ntawm qhov tsis zoo koj tau txais qhov zoo, vim tias ob lub cim tsis zoo raug muab tso tseg
Koj yuav ua li cas thiaj paub tias kev sib raug zoo yog qhov zoo lossis tsis zoo?
Qhov zoo correlation coefficient txhais tau hais tias raws li tus nqi ntawm ib qho kev sib txawv nce, tus nqi ntawm lwm qhov sib txawv nce; raws li ib tug txo qhov qis dua. Qhov tsis zoo correlation coefficient qhia tau hais tias raws li ib qho kev sib txawv nce, qhov txo qis, thiab vice-versa
Tus qauv qauv yog dab tsi Qhov txawv ntawm tus qauv qauv thiab tus qauv molecular yog dab tsi?
Cov mis mos molecular siv cov cim tshuaj thiab cov ntawv sau npe los qhia cov naj npawb ntawm cov atoms sib txawv hauv cov molecule lossis compound. Ib qho empirical formula muab qhov yooj yim tshaj plaws, tag nrho tus lej piv ntawm atoms hauv ib qho chaw. Cov qauv qauv qhia txog kev sib koom ua ke ntawm cov atoms hauv cov molecule